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1938 Bentley 4.25-Liter

Bentley Motors was acquired from W.O. Bentley by Rolls-Royce in 1931.

1938 Bentley 4.25-Liter photo
Drophead Coupe by Vanden Plas
View info and history
The Derby Bentley made its debut in August of 1933 at the Ascot Races. It had a 'double dropped' chassis with a semi-elliptic suspension in both the front and rear and four-wheel drum brakes. Power was from a more potent version of its Rolls-Royce 20/25 sibling's 3669cc overhead valve straight-six engine mated to a four-speed manual transmission. The modifications included a crossflow head, twin SU carburetors, a higher compression ratio, and a re-profiled camshaft. Due to the quietness of the engine, it was soon dubbed the 'Silent sportscar.' In 1936, the engine was enlarged to 4257cc and due to its popularity, the smaller capacity powerplant was dropped.

Further revisions and modifications followed in 1938, including improved steering, centralized chassis lubrication, automatic shock absorbers (with hand control override), improved 'big-end' crankshaft bearings, and an 'overdrive' gearbox with direct drive on 3rd gear and overdrive on 4th gear. These changes were first applied to chassis B2MR onwards.

2,411 (some sources state 2,442) examples of the Derby Bentley were built. Approximately 50 percent were bodied by Park Ward in a limited number of styles. 1,234 were 4.25-Litre cars.


by Daniel Vaughan | Sep 2019

Related Reading : Bentley 4¼ Litre History

Bentley Motors was purchased by Rolls-Royce in 1931. One of the first of the Bentley vehicles produced after this merge was the 1933 3-12 Liter, a vehicle similar to the Rolls Royce 2025. Bentley automobiles personified racing and the 3 12 Liter vehicle followed this tradition. It had a more powerful engine than its 2025 counterpart. This had been achieved by adding a second carburetor and modification....
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1938 Bentley 4.25-Liter Vehicle Profiles

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Performance and Specification Comparison

Price Comparison

$468-$7,200
1938 4.25-Liter
$7,200-$9,500
1938 Bentley 4.25-Liter Base Price : $7,200

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4¼ Litre

Specification Comparison by Year

Year
Production
Wheelbase
Engine
Prices
126.00 in.
6 cyl., 259.35 CID., 125.00hp
126.00 in.
6 cyl., 259.35 CID., 125.00hp
117.48 in., 117.50 in., 126.00 in.
6 cyl., 274.61 CID., 125.00hp
$7,200 - $7,200
117.50 in.
6 cyl., 274.61 CID., 125.00hp
126.00 in.
6 cyl., 259.78 CID., 125.00hp

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